LINEAR TECHNOLOGY CONFIDENTIAL

Electrical Specifications Subject to Change

LTC5540

1

5540p

TYPICAL APPLICATION

DESCRIPTION

0.6GHz to 1.3GHz

High Dynamic Range

Downconverting Mixer

passive downconverting mixers covering the 600MHz

to 4GHz frequency range. The LTC5540 is optimized for

0.6GHz to 1.3GHz RF applications. The LO frequency

must fall within the 0.7GHz to 1.2GHz range for optimum

performance. A typical application is a LTE or GSM receiver

with a 700MHz to 915MHz RF input and high-side LO.

The LTC5540 is designed for 3.3V operation, however; the

IF amplifier can be powered by 5V for the highest P1dB.

An integrated SPDT LO switch with fast switching accepts

two active LO signals, while providing high isolation.

The LTC5540’s high conversion gain and high dynamic

range enable the use of lossy IF filters in high-selectivity

receiver designs, while minimizing the total solution cost,

board space and system-level variation.

High Dynamic Range Downconverting Mixer Family

PART#

RF RANGE

LO RANGE

LTC5540

600MHz –1.3GHz

700MHz – 1.2GHz

LTC5541

1.3GHz – 2.3GHz

1.4GHz – 2.0GHz

LTC5542

1.6GHz – 2.7GHz

1.7GHz – 2.5GHz

LTC5543

2.3GHz – 4GHz

2.4GHz – 3.6GHz

FEATURES

APPLICATIONS

(LTE, GSM, CDMA)

L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear

Technology Corporation. All other trademarks are the property of their respective owners.

IF

AMP

ADC

IF

RF

700MHz

TO

915MHz

LNA

BIAS

SYNTH 2

SYNTH 1

3.3V or 5V

22pF

5.6pF

1.5pF

1μF

150nH

150nH

1nF

1nF

190MHz

SAW

190MHz

BPF

IMAGE

BPF

RF

SHDN

22pF

SHDN

(0V/3.3V)

LTC5540

LOSEL

LO SELECT

(0V/3.3V)

LO

1090MHz

ALTERNATE LO FOR

FREQUENCY-HOPPING

100pF

100pF

LO1

LO2

5540 TA01

1μF

LO

Wideband Receiver

Wideband Conversion Gain, IIP3

and NF vs RF Input Frequency

RF FREQUENCY (MHz)

600

6

15

14

13

11

10

12

9

7

8

16

18

27

26

25

23

22

24

21

19

20

28

900

1000

700

5540 TA01a

800

IIP3

NF